Doctor blades



July 2, 1929. F. w. VICKI-:RY

MECHANISM FOR INSERTING DOCTOR BLADES Filed DSO. 24, 1927 prise a single spring plateinstead of a plu-- Patented July 2, 192.9.

ortica.

FREDERICK W. VICKERY, OF'LONDON, ENGLAND, ASSIGNOR TO VICKERY LIMITED',

OF BOSTON, MASSACHUSETTS, A CORPORATION OF 'MASSACHUSETTS.

MECHANISM FOR INSERTIG DOCTOR BLADES.

Application filed December 24, 192'?.v Serial No. 242,493.

In my Patent No. 1,552,363, granted September 1, 1925, for doctor for calender and like smooth rolls, is discloseda doctor coinprising a lleXible blade held to the periphery of the roll by means of a plurality of spring lingers, one end of each of which carries the blade and the kother end'is carried by a rigid support. the spring lingers in a groove or pocket formed between one faceV and a retaining member or keep carried byvthat linger and y spaced sulilciently from thatlfacef These spring lingers may be independentcof each other so that the grooves or pockets may not always he inexact alinement when the doctor blade is removed. Consequently when in serting anew blade it is sometimes necessary to move thelingers so that their grooves or l v pockets shall in alinement before thebla de can be advanced `from the, groove ory pocket of one nger into thegroove or p ocketo the neXt insuccession. In the case ofl certain machines in which doctors ai'eemployed, it is necessary to inserttthe blades through va hole in the sidelrame of ,the machine and ,in such machines it is not possible to vobtain access to the spring lingers to bring them into alinement while the blade is being inserted.

Thelobject-oftlie present invention is to produce amechanismby which the blade can 'be inserted en dwise and .by whichthe spring lingersare automatically adjusted into alinementif they chance to be out of alinementso thatthe gioorvesor pockets therein are properly. positioned successively to receive the lblade Aas it is presented thereto. For this purpose the. device comprises aholder orcarc rier in which one end portion ol the blade may `be clamped, with means by which this mein-V ber may be guided along'the springlingersin succession in isuch a manner. that the Vspring' fingers aresuccessively moved tobring their grooves or .pockets into alineinent yin, vcase they chance to be out of such alinement. This is thereupon threaded through the grooves or pockets inthe spring lingers as the memloerisdrawn through.

In some cases the blade support may coin- Y rality of lingers.` With such .the aiming .ieaturef of the 'but 1t. lese-aceto construction The blade isusually supported by fr rier is, not

blade, being guidedby its engagement with some suitable parts such as theplate andthe keeps positioned therealong to perform this `function.

F or a more complete understanding of this invention, reference may be had to the accompanying drawings in which Figure 1 is anen'd elevation of a doctor showing the device of the present inventionv r spring Jfingers and the carrier with thefblade `liXed therein partially drawn 'across the row olispring lingers carrying theblade there,

With; y

` Figure Bis a perspective showing certain details ol' the carrying member. Y

Figures 4c, 5 and 6 are detail sections on lines H, 5-5 and 6--6, respectively, of'y vFigure 2. l. A

Referring first to Figures 1 and 2, 1 indicates a portion ofthe supportupon which the Ydoctor proper is mounted. VTo this support i is shownattached-a base bar Zwhich carries a Isei-ies of `spring lingers 3.` As shown these are arrange'dinclose arrayalong the length olf' the bar 2, lbut they might, if desired, be

spaced therealong inthe manner shown in V.my ypatent hereinbefore noted or a single springplate might `be used.

Each of these spring lingers 3 has liXed y theretoat its outer end,'as by means of arivet f 4, a retaining member or keep 5. This keep maybe of any suitable type, but is herein,

shown in the formk of a disk spaced from the adjacent face of its spring linger `by any suitable means suchas, aV spacing washer 6, the space being sufficient to ,permit the positioning Ytherein of tlierear edge ol. the doctor blade y 10. The blade Vmay be retained in position' in this groove or pocket between the keeps and the spring ingersby any suitable means.

YAsthese spi-ing 4lingers areindependent-ly where the keeps are lined thereto may not always be found in alineinent when it is desired plished, however, I provide a carrier indif cated ingeneral atl5. This carrier comprises a main lirameinxeinber 1 6` engageable with the y supported, it is evidentthat their outer ends member may be Vdrawn throughthe machine, f carryingtheJ end ofthe blade therewith, which CJI , other along the line ol the spring lingers and` Vits end is threaded through the eye 3G andv that end of the carrier.

its rear edge so formed as to engage over and be guided by the keeps 5 as the carrier is drawn along the spring lingers.

Along the opposite edge ot the trame meinber it is provided with a slot 18 closed at its outei' edge as at 19 and ot suoli width that the end of the blade may be inserted thei'ein as shown, for example, inflligure 5. This slot extends from the rear end ot the carrier along one side ot the channel 17 to a shoulder portion 20 near the forward end olf the cairier vliorwardly olil which is a portion 21 ol reduced thickness, this portion'l 21 forming a seat to Yreceive a block 22. The Shoulder 20 serves f as an abutment to limit the extent to which the end et the blade 10 may be pushed toward The block 22 may be liXed in its position on the traine by any suitable means such as the bolt 23 extending through a slot 230 in the block 22 and provided with a wing nut 2/1 onV its outer end.

`rllfieunder lace ol the block 22 is cut away at 25 opposite to a similar cut away portion 26 on the trame member 16these two cut away portions' defining a slot 27 having a relatively wlide outer end and tapering rearwardly lengthwise ol the carrier. This slot is so positioned,`as shown best in Figure t, as toreceive the outer ends of the spring lingers 3 therein between the member L16 and the block 22 as the Acarrier is successively drawn along the length ot the doctor, the end openingr of the slot being suliiciently wide to receive therein spring lingers which may be out of alinement with those' previously engaged by 'the carrier, asshown by the spring ngers 3 and Bain Figure l, 'and'gradually move them intol alinement as the narrower portion ot the slot 27 passes into engagement therewith. Thus as the carrier' is drawn along bymeans lwhich will later be described, the spring lingers are successively engaged and rt they are not in alinement with each other they are movedl intol alinement in position to receive the' 'end olI the' blade, which, it will be noted,

positioned Vjaist behind the block 22.

` The blade 1() may be liXed to the carrier toV be drawn therewith inv any suitable manner,

fbntfas herein shown it is clamped in position withi'nthe slot 18 by means oit' a cam 30 best shown in Figure 6. This cani is pi-voted as at 31 within slot 32j in the traine member 16 andis normally urged out ol" clamping position by means el a sprrng 33' reacting between vits outer end and a lug 3401i the frame'. It may be' broughtinto clamping engagement with the blade 10, however, by means such as a cord or' wire 35 threaded through an eye 36 on the traine and enga-ging the outer end of the cam.- Thiscord or vwire 35 is passed through the machine :trom one side to the liXed tothe cam 30'. The blade 10 being in position, andthe forward end ot' the carrier the blade through the machine,successively engaging and insuring aliiienient ol the springl fingers 3 'troni one side to the other and threading the rear edge oit the blade 10 into the grooves or pockets between Veach spring linger and its keep. VUien the toi-ward edge ol the carrier reaches the retaining linger l0 the block 22 is slid outwardly to an extent sullicient to d isengagc it therefrom or the block is removed whereupon tlie'carrier may be pulled entirely through the machine and the blade 10 disen gagedv therefrom and itsY end held by the retaining linger lO. The blade is thus inserted in the proper" position and the' carrier removed trom the machine.

lil/There single spring plate for holding vthe blade is employed, the carrier is ydrawn therealong, being held thereto by engageinei'it of the member 16 and the block 22 on' opposite sides, and guided thereby and by the keeps which are spaced tlierealong andride Vin the channel'l'.' rlhe flaring ol'- the slot' 27 facilities the placing ol. the device in position preparatory to drawing it through the machine even thoughits centering action is 'not needed, as it may be when a modihcations might be made therein with` out departing from its spirit or scope as defined by the appended claims, A

Iclaim: Y 'Y 1. A device for positioning doctor blades relativeto a seriesv of blade-retaining elenients, which comprises a carrier for said blade means on said carrier for enOaO'inO' said Y b C. ze

elements to` be `guidedthereby in posit-lento presentV said bla-des successively into cooperative relation to said elements as said carrier? is drawn along said series of'elements, and means for so drawmgsaid carrier. f

2. A device of the classl described comprising a carrier member to which the endet' aV` and hold them in alineinent as said device is drawn thereacross, the forward end of said slot being wide to permit al linger out oli' alinementfto enter them, and tapering toV draw Y said misalinedL linger into alinement as saidV device' is drawn', saidcarrier having a bladereceiving slot, and means for holding a blade in said slot in position to present said blade successively into cooperative relation with said holding elements as said carrier s drawn across said series of ingers.

4. Av device for positioning doctor blades relative to a'series of ingers having bladeholding elements spaced from one side thereof, which comprises a carrier having means with which said holding` elements may engage as said carrier is drawn thereacross to thereby guide the movement of said carrier, means 'or successively engaging said ingers and alining thespaces between said fingers and holding elements as said carrier is moved, and means on said carrier for engaging a doctor blade and successively positioning it in said spaces as said carrier is moved.

5. A device of' the class described comprising a carrier member to which the end of a doctor blade may be fixed, said carrier member having means'i'or slidably guiding it rela-V tively to one or more blade supports to permit it to be drawn'in a path across said support positioned to presentrsaid blade into coopera# tive relation to blade-retaining elements carried by said supports.

6. A device for positioning doctor blades relative to va series of `blade-retaining elements, which comprises a carrier for said blade, means `for sli'dably guiding said carrier relatively to said elements to present said blade into cooperative relation to said elements, and means i'or sliding said carrier.

7. A device of the class described comprising a 'frame member having a guide channel extending alongone face, means along one side of said channel for receiving the end portion of a doctor blade, means for clamping a blade in said receiving means, a block iXed to said member and having a portion spaced from said member to receive blade-holding means therebetween with blade-retaining elements on said holding means riding in said channel, and mea-ns engaging and acting to hold said clamp in clamping posit-ion for drawing said member across said fingers.

8. A device for positioning doctor blades relative to blade retaining means which comprises a carrier for said blade, and means on said carrier by which said carrier may be guided relative to said retaining means, to present said blades into cooperative relation to said retaining means as said carrier is drawn along said retaining means.

In testimony whereof l have aflixed my signature.

FREDERICK W; VICKERY. 

